Part I - AGRICULTURAL ENERGY AND POWER ENGINEERING (Sir Rex)

Question 1

When electric current flows through the electrolyte from positive material to negative material, the battery is said to be what?

Answer 1

recharging

Question 2

The solar energy received per unit time on a unit area of a surface perpendicular to the radiation at the limit of the atmosphere and is estimated at 1353 W/M2.

Answer 2

solar constant

Question 3

True or False. Fractional horsepower motors need 1-phase electrical circuits.

Answer 3

True

Question 4

What could be the condition of the battery when the specific gravity reading in the hydrometer is 1.250 to 1.300?

Answer 4

Fully charged

Question 5

True or False. Savonius windmills are vertical axis-type windmills.

Answer 5

True

Question 6

It joins connecting rod and piston of an engine.

Answer 6

piston pin

Question 7

In a four-cylinder, four-stroke diesel engine, how many spark plugs are required?

Answer 7

None

Question 8

The device located in the exhaust system that reduces exhaust noise.

Answer 8

muffler

Question 9

Also known as “current wheel” because water passing under the wheel strikes the blades.

Answer 9

under shot

Question 10

In compression ignition engine, which part of the engine is controlled by the governor?

Answer 10

injection pump

Question 11

The event when the sun’s apparent path is displaced farthest north or south from the equator.

Answer 11

solstice

Question 12

A type of slow rotating waterwheel that operates in a horizontal plane.

Answer 12

tub wheel

Question 13

A chemical device for generating electricity.

Answer 13

Battery or cell

Question 14

Types of four-wheel tractors with power rating below 32 hp.

Answer 14

compact type

Question 15

A barrier constructed to contain the flow of water and serves to create the elevation difference or head.

Answer 15

dam

Question 16

A weather parameter measured by an instrument known as the “Campbell-Stokes”.

Answer 16

sunshine/solar duration

Question 17

The device that controls the speed of the engine by admitting more or less fuel mixture to the combustion chamber.

Answer 17

throttle or accelerator

Question 18

What do you call the fuel mixture that is containing more than the required amount of air to combine with all the carbon in the fuel?

Answer 18

lean combustion

Question 19

The anaerobic microbial breakdown of sugar into alcohol.

Answer 19

Fermentation

Question 20

The distance from the center of the crankshaft to the center of the crankpin.

Answer 20

crank throw

Question 21

The engine speed when the throttle or accelerator lever is fully released and there is no load on the engine.

Answer 21

idle speed

Question 22

The engine speed when the throttle or accelerator

Answer 22

idle speed

Question 23

How many liters are there in a gallon?

Answer 23

3.875 L

Question 24

A device for measuring engine speed or rpm

Answer 24

tachometer

Question 25

In an ICE, it allows the flow of fuel, air or exhaust gases.

Answer 25

valve

Question 26

It is part of the transmission system that permits the disconnection of power unit from the transmission gears and drive wheels of most automotive vehicles.

Answer 26

clutch

Question 27

A set of bevel gears that allows power to be transmitted to each axle at different speeds to allow satisfactory steering of the tractor.

Answer 27

differential

Question 28

A type of waterwheel where the buckets receive water at about radial height.

Answer 28

breast wheel

Question 29

It carries the essential information about a particular motor or engine.

Answer 29

name plate

Question 30

what is the firing interval for a four-stroke, six cylinder engine?

Answer 30

120%

Question 31

A supercharger driven by the engine exhaust system.

Answer 31

turbocharge

Question 32

The discharging of burned gases from the combustion chamber.

Answer 32

exhaust stroke

Question 33

How much proof does a 90% ethanol has?

Answer 33

180

Question 34

It is the single most important property of lubricating oil

Answer 34

viscosity

Question 35

The number of cells of 12-volt lead acid batteries has.

Answer 35

6

Question 36

The power generated at the belt pulley and available for useful work.

Answer 36

brake power

Question 37

A wheel with a lobe or projection on its face that changes the motion of the member in contact with it.

Answer 37

cam

Question 38

The microorganism that convert simple sugar compounds into alcohol

Answer 38

yeast

Question 39

It is a ratio of total cylinder volume to the clearance volume.

Answer 39

compression ratio

Question 40

True of False. Given the same wind speed, multi-blade windmills produces lower torque than few-bladed windmills.

Answer 40

False

Question 41

The number of degrees the earth’s axis of rotation is tilted with respect to its plane of revolution around the sun.

Answer 41

23.45 degrees

Question 42

The chemical formula of an octane fuel.

Answer 42

C8H18

Question 43

The normal ambient temperature for motor operation.

Answer 43

40 degrees celcius

Question 44

It stores energy during the power stroke and returns this energy during idle strokes.

Answer 44

flywheel

Question 45

What is the air-to-fuel ratio of methane?

Answer 45

4:1

Question 46

The instrument that measures global radiation.

Answer 46

pyranometer

Question 47

A type of slow or non-flowing lubricant used in bearings and universal joints.

Answer 47

grease

Question 48

The source of all the energy on earth

Answer 48

sun

Question 49

In heat engines, it is the outlet duct for exhaust gases.

Answer 49

exhaust manifold

Question 50

It is the technical term to call the diameter of the engine cylinder.

Answer 50

bore

Question 51

The firing interval for a four-stroke engine with four in-lined cylinders

Answer 51

180

Question 52

It is a condition describing that the cooling system is excessively hot and usually accompanied by streaming steam coming out of the radiator.

Answer 52

over heating

Question 53

Why is water a better coolant than air?

Answer 53

higher Specific Heat Capacity

Question 54

The instrument that measures direct radiation.

Answer 54

pyrheliometer

Question 55

It is also known as “destructive distillation”.

Answer 55

pyrolysis

Question 56

Normally, how many speed reduction(s) does a farm tractor has?

Answer 56

3

Question 57

The type of “work” in the farm that requires pulling or drawing effort.

Answer 57

tractive work

Question 58

The other term used to describe the motor starting current.

Answer 58

lock rotor current

Question 59

This restricts the air flow through the carburetor.

Answer 59

choke

Question 60

Calculate the daylight hours on January 1, 2009 in Los Banos, Laguna (lat = 14.154 degrees; long = 121.218 degrees)

Answer 60

11.8 hrs

Question 61

The moment of time when the sun crosses the meridian of the observer.

Answer 61

solar noon

Question 62

It is the formation of methane by microorganisms known as methanogens.

Answer 62

methanogenesis

Question 63

The proportions of air and fuel supplied to the engine cylinders for combustion.

Answer 63

air-to-fuel ratio

Question 64

A narrowed passageway in the carburetor that increases the velocity of air moving through it.

Answer 64

venturi

Question 65

What could be the speed of the engine, in revolution per second, if the piston speed is 360 meters per minute and the crank throw is 50 millimeters?

Answer 65

1800 rpm

Question 66

It measures the ability of an engine to convert fuel into useful work.

Answer 66

mechanical efficiency

Question 67

The heat exchanger that removes heat from a coolant passing through it.

Answer 67

radiator

Question 68

An engine in which fuel is burned inside the engine itself rather than in a separate device.

Answer 68

Internal Combustion Engine

Question 69

In a typical spark ignition engine, the highest percentage of heat loss is accounted for what?

Answer 69

exhaust heat

Question 70

The equivalent percentage alcohol content of a 150 proof ethanol.

Answer 70

75%

Question 71

The term used when the sun is nearest the earth.

Answer 71

perihelion

Question 72

It provides the gap for the high voltage surge to jump and ignite the fuel in the engine cylinder.

Answer 72

spark plug

Question 73

Determine the indicated horsepower of a 4-stroke, 100 mm x 100 mm, 6-cylindera engine running at 1600 rpm. The mean effective pressure per power stroke is 550 kPa.

Answer 73

46,324 hp

Question 74

The state of charge of a lead acid battery if the specific gravity meter reads 1.150 or less

Answer 74

fully discharged

Question 75

The piston position at the lower limit of its travel in the cylinder.

Answer 75

bottom dead center

Question 76

What part of the magneto system in small spark ignition engines acts as a transformer?

Answer 76

ignition point

Question 77

It is the inlet duct for fuel and air or just air for diesel engines.

Answer 77

intake manifold

Question 78

Type of windmills or wind turbines that accept wind from any direction.

Answer 78

vertical axis

Question 79

A type if two-tractor fitted with a drawbar for traction work and a power-take-off for rotary work.

Answer 79

general purpose

Question 80

Also known as “impulse” turbine

Answer 80

Pelton

Question 81

True or False. The maximum power that the wind machine can recover from the speeding mass if air is only about 60%.

Answer 81

True

Question 82

It is the distance the piston travels in one direction.

Answer 82

piston stroke displacement

Question 83

The term used to describe the power generated in the cylinder and received by the piston.

Answer 83

Indicated hp

Question 84

In lead acid batteries, is the total number of plates per cell an odd number or even number?

Answer 84

odd number

Question 85

A condition wherein the governor responds repeatedly to the irregular speed when the engine is loaded.

Answer 85

governor hunting

Question 86

In solar engineering, it is the term used when the sun is farthest from the earth.

Answer 86

aphelion

Question 87

It encloses one end of the engine cylinder and forms the upper end of the combustion chamber.

Answer 87

cylinder head

Question 88

A unit of measurement of power and is equals to doing work at the rate of 33,000 ft.lb/min.

Answer 88

HP

Question 89

The usual type of oil-level used for most ICE.

Answer 89

dipstick

Question 90

The condition when the turbocharger delivers air to the engine at an excessively high pressure.

Answer 90

over boosting

Question 91

An imaginary line around the Earth forming the great circle that is equidistant from the north and south poles

Answer 91

equator

Question 92

In heat engines, it is the event in which the heat energy of the fuel is converted into mechanical energy.

Answer 92

power stroke

Question 93

The horizontal movement of air caused by uneven heating of the earth’s surface by the sun and the rotation of the earth.

Answer 93

wind

Question 94

It is the solution that conducts electricity in lead-acid batteries.

Answer 94

electrolyte

Question 95

It is the length of time that the biomass stays in an anaerobic digester for microbial conversion.

Answer 95

retention time

Question 96

The ratio of the power extracted by a wind turbine to the power available in the wind stream.

Answer 96

power coefficient

Question 97

He conceived the idea of utilizing the heat produced by high compression for igniting the fuel charge in the cylinder in 1892.

Answer 97

Rudolf Diesel

Question 98

Type of motor duty rating wherein the motor is operated for more than 60 minutes without rest.

Answer 98

continuous duty rating

Question 99

It is the volume occupied by the fuel and air mixtures or air alone when the piston is at the top dead center.

Answer 99

clearance volume

Question 100

It is the order in which engine cylinders deliver their power strokes beginning with the cylinder 1.

Answer 100

firing order

Question 101

What do you call the part of the electrical system of a farm tractor that charges the storage battery?

Answer 101

alternator

Question 102

It is the distance the piston travels in the cylinder in one minute.

Answer 102

piston speed

Question 103

The top rings of the piston that holds compression and combustion pressure.

Answer 103

compression ring

Question 104

The process of hydrolyzing complex carbohydrate into a simple soluble fermentable sugar.

Answer 104

saccharification

Question 105

This gives the amperes the battery can discharge for 30 seconds without dropping below 1.2 volts per cell.

Answer 105

cold cranking

Question 106

An index of the roughness of a surface reflecting the frictional resistance offered by the surface air flow.

Answer 106

roughness coefficient

Question 107

An event in internal combustion engine where the combustion chamber is filled with fresh charge of fuel and air mixture.

Answer 107

intake stroke

Question 108

A type of farming technique where in the biomass resource is grown extensively for energy purposes.

Answer 108

energy farming

Question 109

The nozzle or valve through which the fuel is injected into the combustion chamber of an engine.

Answer 109

fuel injector

Question 110

It rates the battery on the basis of the number of minutes that a new fully charged battery at 26.6 degrees Celsius will deliver 25 amperes while maintaining a voltage of 1.75 volts per cell.

Answer 110

reserve capacity

Question 111

The term use to describe the partial or complete interruption of the fuel flow in the fuel-feed system as a result of vaporization of the fuel and the formation of gas bubbles.

Answer 111

vapor lock

Question 112

The event in ICE during which the charge of air and fuel is compressed in the combustion chamber.

Answer 112

compression stroke

Question 113

A magnetized bar of metal.

Answer 113

magnet

Question 114

The rate of doing work.

Answer 114

power

Question 115

The displacement of exhaust gas from the combustion chamber by fresh fuel charge.

Answer 115

scavenging

Question 116

Which is thicker, lubrication oil with SAE #40 or SAE #30?

Answer 116

SAE #40

Question 117

It is defined as the angular distance north (+) or south (-) if the plane of earth’s equator.

Answer 117

latitude

Question 118

What is the speed ratio of the camshaft to the crankshaft?

Answer 118

1:2

Question 119

True or False. Under normal conditions, wind speed at 10 meters is greater than at 5 meters above ground.

Answer 119

True

Question 120

The power of mature human being.

Answer 120

1. hp

Question 121

Generally which uses thicker oil for lubrication, gasoline engine, or diesel engine?

Answer 121

diesel engine

Question 122

True or False. Using diesel fuel with higher cetane rating prevents engine locking.

Answer 122

True

Question 123

This type of windmill is generally used for water pumping because of the high torque it produces during conversion.

Answer 123

multiblade

Question 124

This type of windmill is generally

Question 125

It receives the power produced by expansion of gases and transmits it to other mechanical parts.

Answer 125

piston

Question 126

It is the ratio of the useful mechanical power to the power value of the fuel consumed.

Answer 126

thermal efficiency

Question 127

The mechanical device that controls the flow and supply of fuel mixture to the cylinder with respect to the desired speed, power output and existing operating conditions of the engine.

Answer 127

governor

Question 128

The power developed at the hitch and available for pulling, dragging, or similar tractive effort.

Answer 128

drawbar hp

Question 129

The delay time required for the diesel fuel to vaporize, mix with air, and ignite after its injection to the combustion chamber.

Answer 129

ignition delay

Question 130

It is the ratio of the blade tip speed to the wind speed.

Answer 130

tip speed ratio

Question 131

The most common type of windmill used for water pumping in the Philippines.

Answer 131

multibladed

Question 132

The mixing of octane fuel with air to get a combustible mixture.

Answer 132

carburetion

Question 133

This type of windmill is generally used for electricity generation rather than for mechanical conversion.

Answer 133

highspeed windmill

Question 134

A special gear-driven shaft in a tractor designed to power integral mounted or trailing implements.

Answer 134

PTO

Question 135

A biomass conversion process carried out by several microorganisms in which organic solids are converted into methane, carbon dioxide, hydrogen, and other products.

Answer 135

Anaerobic digestion

Question 136

The space between the top of the piston and the cylinder head in which the fuel is burned.

Answer 136

combustion chamber

Question 137

A traditional and most widely practiced method of deriving energy from biomass sources.

Answer 137

direct combustion

Question 138

The amount of heat energy contained in any fuel.

Answer 138

heating value

Question 139

The term use to describe the flow of electrons through a conductor.

Answer 139

current

Question 140

It is a mixture of butane and propane and maybe used to a considerable extent as fuel engine.

Answer 140

LPG

Question 141

The event when the sun’s annual apparent path passes and the plane of the earth’s equator coincide.

Answer 141

equinox

Question 142

A device used to measure the potential differences (voltage) between terminals of battery.

Answer 142

volt meter

Question 143

An uncontrolled second explosion with spontaneous combustion of the remaining compressed fuel charge resulting in a pinging sound.

Answer 143

knocking

Question 144

An alternative fuel derived from vegetable oils in a process called transesterification that is equivalent to diesel refined from petroleum.

Answer 144

biodiesel

Question 145

A phenomenon that takes place whenever a conductor cuts a magnetic field and voltage is induced proportional to the rate of cutting the lines of force.

Answer 145

electromagnetic induction

Question 146

A device mounted on or connected top the engine air intake for filtering dirt and dust out of the air entering the engine.

Answer 146

air cleaner

Question 147

What do you call the device added to the exhaust system of automotive vehicles to reduce hydrocarbon and carbon monoxide pollutants in the exhaust gases?

Answer 147

catalytic converter

Question 148

A common feature of this windmill type is the vane which is used to orient the machine to the prevailing wind direction.

Answer 148

yaw control

Question 149

The general term use to describe engine oils, grease, and gear oils.

Answer 149

lubricants

Question 150

In electric motor operations, this factor is multiplied to the power rating to determine maximum load that can be safely carried by the motor under continuous operation.

Answer 150

service factor

Question 151

The basic unit of resistance.

Answer 151

ohm

Question 152

This is a lead-calcium battery that is sealed so that no water is lost from the electrolyte.

Answer 152

maintenance free battery

Question 153

Name the other classification of electric motors based on the electrical service requirement aside from the single-phase and the three-phase motors.

Answer 153

AC motor

Question 154

The electric motor that cranks the engine for starting.

Answer 154

starter motor

Question 155

An engine-driven device that generates its own primary current, transform that current into high-voltage surge, and delivers to the proper spark plugs.

Answer 155

magneto

Question 156

It is an axial-flow reaction turbine and the runner blades are adjustable.

Answer 156

kaplan

Question 157

Term used to describe the energy flow which is replenished at the same rate as it is used.

Answer 157

renewable energy

Question 158

The wind speed referred to a specific blade-tip velocity in the case of a specific turbine, at which the wind turbine starts supplying useful output power at the shaft.

Answer 158

cut-in windspeed

Question 159

The chemical formula of ethanol or ethyl alcohol.

Answer 159

C2H5OH

Question 160

A weight in the crankshaft opposite each crankpin that reduces vibration and bearing loads.

Answer 160

counterweight

Question 161

The lubrication of all the principal engine parts is dependent directly upon the splashing of the engine oil by this device located at the bottom side of the connecting rod.

Answer 161

oil slinger

Question 162

True or False. One metric horsepower is equal to 746 watts.

Answer 162

False

Question 163

The designated ignition quality of a particular diesel fuel.

Answer 163

setting rating

Question 164

It is the angular position of the sun at solar noon with respect to the earth’s equator.

Answer 164

solar declination

Question 165

A device that converts solar radiation into electricity.

Answer 165

PV Device

Question 166

A body the absorbs completely all the radiation incident upon it.

Answer 166

black body

Question 167

In batteries, this is identified as the battery post with larger diameter and designated by a positive sign (+).

Answer 167

terminal

Question 168

A filter that removes impurities from the engine oil passing through it.

Answer 168

oil filter

Question 169

A thermo-chemical process in which the biomass resource is subjected to partial combustion with limited supply of air to produce high temperature gas.

Answer 169

gasification

Question 170

It is the angular displacement of the sun, east or west of the local meridian due to the rotation of the earth on its axis.

Answer 170

hour angle

Question 171

The science, art, and business of cultivating soil, producing crops, and raising livestock; farming.

Answer 171

agriculture

Question 172

The capacity of a physical system to do work.

Answer 172

energy

Question 173

The term that is applied to the last gear reduction unit in the power transmission train of a tractor.

Answer 173

final drive

Question 174

What causes the ignition of the fuel charge in all compression ignition engines?

Answer 174

heat of compression

Question 175

The device that distributes the secondary voltage to each spark plug in multi-cylinder ignition system.

Answer 175

distributor

Question 176

True or False. Provided that both engines have the same specifications, a two-stroke engine has more power strokes than a four-stroke engine for the same crankshaft speed.

Answer 176

True

Question 177

Designated ignition quality of a particular fuel which is determined by comparing with a mixture of isooctane and heptane.

Answer 177

octane rating

Question 178

A unit of measurement of power and is equals to doing work at the rate of 33,000 ft-lb/min.

Answer 178

horsepower

Question 179

The “beast of burden” of Philippine agriculture.

Answer 179

carabao

Question 180

It is the volume displaced by the piston in one stroke.

Answer 180

displacement volume